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. 2020 Aug 25;12(1):124–133. doi: 10.1016/j.apr.2020.08.028

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© 2020 Turkish National Committee for Air Pollution Research and Control. Production and hosting by Elsevier B.V.

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Fig. 5 — a) J_NO2 mean diurnal variation for January (dotted gray), February (dashed blue), 1–13 March (light blue and diamonds), 14–31 March (dashed red), and April (dashed green and stars. b) Mean J_NO2 under sunny conditions before (Jan-13 March, blue line) and after (14 March–April, red line) the COVID-19 lockdown.